Problem with Windows Media Center in Vista -

I'm hoping that someone in the group can assit. I have a new HP
Pavilion laptop with Vista Home Premium, or at least I've had it for
the past 6 weeks and have loved it, however WMC throws errors during
repetitive tasks. This is frequent enough that it has rendered WMC
unusuable. The specific error is:

An unhandled exception ('.NullReferenceException.4313665F') occurred
in ehrec.exe [3788].

My product version is:

Windows Media Center
Windows Vista
Version 6.0.6000.16484

The only two pieces of software which I have installed recently are
yahoo messenger and Microsoft Silverlight. I suspec that the latter
may be the cause. Either that or WMC has just got itself in a twist.

I have tried system restore to a point about a week ago with no
success.

My question is - how can I fix this without reinstalling Vista? MS in
their wisdom seem to have made it impossible to uninstall and re-
install WMC in Vista HP.

Any assistance or guidance would be appreciated!

Stewart

With a lot of reading up on other posts and a bit of bravery I fixed
this problem myself. It turns out that WMC had got itself confused.
Deleting a few files wiped out the corruption. I followed the
following procedure.

1) Closed WMC
1) Deleted ProgramData/Microsoft/eHome/mediacenterdatastore.db
2) Deleted ProgramData/Microsoft/eHome/Recordings/Recordings.xml
3) Ran Windows/eHome/mcUpdate.exe - u
5) Opened WMC

Ok... I'm happy again.

Where do you find the following files?
1) Deleted ProgramData/Microsoft/eHome/mediacenterdatastore.db
2) Deleted ProgramData/Microsoft/eHome/Recordings/Recordings.xml
3) Ran Windows/eHome/mcUpdate.exe - u